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In this study, the Electrolux ammonia-water-hydrogen vapor absorption system (VAS) has been analyzed for cooling load with different heat transfer media. The performance of the VAS under variable environmental conditions was investigated. It has been concluded that a high heat transfer medium is essential to have a high COP system. The cooling load of air had a COP of about 0.31%, where water improved the COP to 15%. This study also indicated that moving from natural convection to forced convection improves the evaporator temperature from -10 oC to -11.6 oC. Mist water and mist ethanol improved the evaporator temperature to -12.8 oC and -13.7 oC respectively. This study emphasizes choosing suitable heat transfer medium with the VAS maximizes the COP of the system, it also indicates that better heat transfer from the condenser such as ground source heat exchanger or pool cooling condenser must be used instead of natural convection with air.
